AtLAST -- Determination of Halo Mass Density Profiles at kpc Scales through Magnification Bias
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arXiv
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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866914202917011456 |
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| author | González-Nuevo, Joaquín Bonavera, Laura Cano, Juan Alberto Crespo, David Fernández-Fernández, Rebeca Franco, Valentina Cueli, Marcos M. Casas, José Manuel Mroczkowski, Tony Ciccone, Caludia Hatziminaoglou, Evanthia Messias, Hugo |
| author_facet | González-Nuevo, Joaquín Bonavera, Laura Cano, Juan Alberto Crespo, David Fernández-Fernández, Rebeca Franco, Valentina Cueli, Marcos M. Casas, José Manuel Mroczkowski, Tony Ciccone, Caludia Hatziminaoglou, Evanthia Messias, Hugo |
| contents | Magnification bias, the lensing-induced modification of background source number counts, provides a uniquely powerful probe of the mass density profiles of galaxies and clusters down to kpc scales. Unlike shear-based weak lensing, magnification bias does not rely on galaxy shapes and thus avoids dominant small-scale systematics. Existing studies, however, are limited by sky coverage, positional uncertainty, and insufficiently deep, confusion-limited submillimetre (submm) surveys. A next-generation wide-field, high-throughput submm facility like the proposed 50m-telescope AtLAST is required to unlock this technique's full diagnostic power. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_13895 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | AtLAST -- Determination of Halo Mass Density Profiles at kpc Scales through Magnification Bias González-Nuevo, Joaquín Bonavera, Laura Cano, Juan Alberto Crespo, David Fernández-Fernández, Rebeca Franco, Valentina Cueli, Marcos M. Casas, José Manuel Mroczkowski, Tony Ciccone, Caludia Hatziminaoglou, Evanthia Messias, Hugo Cosmology and Nongalactic Astrophysics Magnification bias, the lensing-induced modification of background source number counts, provides a uniquely powerful probe of the mass density profiles of galaxies and clusters down to kpc scales. Unlike shear-based weak lensing, magnification bias does not rely on galaxy shapes and thus avoids dominant small-scale systematics. Existing studies, however, are limited by sky coverage, positional uncertainty, and insufficiently deep, confusion-limited submillimetre (submm) surveys. A next-generation wide-field, high-throughput submm facility like the proposed 50m-telescope AtLAST is required to unlock this technique's full diagnostic power. |
| title | AtLAST -- Determination of Halo Mass Density Profiles at kpc Scales through Magnification Bias |
| topic | Cosmology and Nongalactic Astrophysics |
| url | https://arxiv.org/abs/2512.13895 |